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Mineral Nutrition

Multiple Choice Questions

11.

which one of the following is not a micronutrient?

Molybdenum
Magnesium
Zinc
Zinc

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12.

The free-living, anaerobic nitrogen - fixer is

Beijerinckia
Rhodospirillum
Rhizobium
Rhizobium

587 Views

13.

Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statement is not correct during the process of nitrogen fixation?

Leghaemoglobin scavenges oxygen and is pinkish in colour
Nodules act as a site for nitrogen fixation
The enzyme nitrogenase catalyse the conversion of atmospheric N₂ to NH₃
The enzyme nitrogenase catalyse the conversion of atmospheric N₂ to NH₃

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14.

Manganese is required in

nucleic acid synthesis
plant cell wall formation
photolysis of water during photosynthesis
photolysis of water during photosynthesis

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15.

Which of the following is a symbiotic nitrogen fixer?

Glomus
Azotobacter
Frankia
Frankia

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16.
Nitrogen-fixation in root nodules of Alnus is brought about by

Bradyrhizobium

Clostridium

Frankia

Frankia

Frankia

Nitrogen is the most critical element. The atmosphere is the greatest reservoir of nitrogen. Molecular nitrogen cannot be utilised directly by plants. It has to be fixed or converted into compounds prior to utilisation. symbiotic nitrogen fixation is accomplished by Rhizobium species, which occurs on the roots of leguminous plants. Certain non-leguminous plants also form nodules to fix nitrogen. The best-known example in the temperate region is alder (Alnus sp.). The bacteria involved in nodule formation is an Actinomycetes, the frankia.
Clostridium is anaerobic saprotrophic free-living nitrogen-fixing bacteria.
Bradyhizobium is symbiont in plants of parasponia and soybean.

The azohizobium forms both stem and root nodules in Sesbania (aquatic plant).

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17.

The two subunits of ribosome remain united at a critical ion level of

Copper
Manganese
Manganese
Manganese

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18.

Which one of the following elements is not an essential micronutrient for plant growth?

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19.

Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?